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Entrainment in Cumulus Clouds: What Resolution is Cloud-Resolving?

Craig, G. C. and Dörnbrack, A. (2008) Entrainment in Cumulus Clouds: What Resolution is Cloud-Resolving? Journal of the Atmospheric Sciences, 65, pp. 3978-3988. DOI: 10.1175/2008JAS2613.1.

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Official URL: http://journals.ametsoc.org/doi/pdf/10.1175/2008JAS2613.1

Abstract

Systematic numerical experiments were conducted to determine the spatial resolution required to resolve a moist thermal show convergence at a scale proportional to the smaller of the initial thermal diameter D0 and a buoyancy length scale Lbuoy. The buoyancy length scale Lbuoy = ΔT0/ΔΓ (ΔT0 is the initial buoyancy excess of the thermal and ΔΓ is the ambient stratification) describes the maximum vertical displacement that can be induced against the stratification in the environment by buoyancy-driven pressure perturbations in the cloud and, thus, the maximum scale of eddies that cross the cloud boundary. For typical atmospheric conditions in which the cloud size D0 is larger than Lbuoy, numerical simulations of the mixing processes in cumulus clouds must resolve Lbuoy.

Document Type:Article
Title:Entrainment in Cumulus Clouds: What Resolution is Cloud-Resolving?
Authors:
AuthorsInstitution or Email of Authors
Craig, G. C.UNSPECIFIED
Dörnbrack, A.UNSPECIFIED
Date:2008
Journal or Publication Title:Journal of the Atmospheric Sciences
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:65
DOI:10.1175/2008JAS2613.1
Page Range:pp. 3978-3988
Status:Published
Keywords:Cumulus Clouds, Cloud-Resolving
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Jana Freund
Deposited On:13 Sep 2007
Last Modified:20 Oct 2014 14:32

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